# Relationship history for MSHA mine 5002081

Current hierarchy: **Robert  Hafner; Nicholas I  Klescewski; Kenneth A  Hughes III → Arctic Placer Drilling & Mining LLC → Swanberg**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Arctic Placer Drilling & Mining LLC → Swanberg; 2021-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert  Hafner et al → Swanberg; 2021-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Hafner et al → Arctic Placer Drilling & Mining LLC; 2021-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nicholas I  Klescewski et al → Arctic Placer Drilling & Mining LLC; 2021-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth A  Hughes III et al → Arctic Placer Drilling & Mining LLC; 2021-04-26 to current/open; source msha-controller-operator-history